Genus Onchobdella Paperna, 1968

TYPE SPECIES. — Onchobdella voltensis Paperna, 1968, by original designation.

OTHER SPECIES INCLUDED. — Onchobdella aframae Paperna, 1968; O. bopeleti Bilong Bilong & Euzet, 1995; O. krachii Paperna, 1968; O. melissa Pariselle & Euzet, 1995; O. pterigyalis Paperna, 1968; O. silverai Pariselle & Euzet, 1995; O. spirocirra Paperna, 1968 .

DIAGNOSIS (according to Pariselle & Euzet [1995a]). — Ancyrocephalidae . Three pairs of cephalic glands. Two posterior ocellae with lenses, two small anterior ocellae. Intestinal caeca without diverticula, joined posteriorly. Two pairs of anchors: one large dorsal, one smaller ventral. Three transverse bars: one dorsal, two ventral well separated. Fourteen uncinuli of same length. Testis posterior inter-caecal.Vas deferens encircling left intestinal caeca. Seminal vesicle present. One prostatic reservoir. Male copulatory complex with penis and accessory piece. Median pre-testicular ovary. Vaginal opening lateral, dextral, sclerotised. Gill parasites on African cichlid fishes.